GM just released a bulletin that states dealers are to inspect, and if necessary replace the automatic transmission on cars in inventory. The problem is water intrusion that will degrade tranny performance. Vehicles affected are certain 2006 Solstices, and the 2007 Sky. Buyers may want to inquire with the dealer if their vehicle is involved, and was inspected prior to purchase.
[edit] discussions can be found here:
Notice if your getting an auto [GM bulletin on auto trans inspection]
Auto Trans check-up
Solstice Recall [not recall - auto trans]
Recall regarding water in transmission? [not a recall -> bulletin]